.l1{
  width: 100px;
  height: 100px;
  line-height: 100px;
  text-align: center;
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  background: #333 url(../img/2.jpg?v=5e70a94611) no-repeat;
  background-size: 100% 100%;
}
